If you are considering the binders and negative pages, it is important to realize that some pages are designed to fit in normal, easily found binders, while other pages are designed to fit in larger, proprietary binders.
The larger pages are big enough to hold a 36 exposure roll.
I prefer myself to be able to uses standard binders.
The next challenge is the one you might encounter if you shoot 6x7 - what do I do with the 10th negative.
You will understand, if you shoot 6x7 .